Why is water especially important in Botswana’s Kalahari region?

In the Kalahari region of Botswana, water is the critical limiting factor for life and development, primarily because the region is characterized by a chronic shortage of surface water.1

The importance of water in this environment is defined by several key factors:

• Edaphic Drought: Much of the Kalahari is covered by deep sand that absorbs rain almost immediately, preventing the formation of surface drainage systems. This creates a condition of edaphic drought, where the soil remains devoid of moisture despite occasional rainfall.23
• Settlement Patterns: Because surface water is scarce and highly localized, human settlement is strictly confined to areas situated near reliable wells or boreholes that provide potable water.1
• Economic Dependence: Cattle are the foundation of the local economy and a primary measure of social status. Year-round grazing is limited to the vicinity of water sources, and the need to manage these herds in a water-scarce environment is a constant challenge for pastoralists.1
• Ecological Sensitivity: While the northern Kalahari receives more rainfall, it remains a paradox of an area with an excess of water in a region otherwise prone to drought. The scarcity of water makes the ecosystem highly vulnerable to desertification caused by overgrazing and the intense pressure placed on limited water-dependent pastures.21